State of Arizona Motion to Intervene, State of Nevada v. Burgum

Arizona Department of Water Resources (ADWR) | October 16th, 2026

Recently, the Department of the Interior and the Bureau of Reclamation issued three agency actions that will govern the agencies’ release of water from federal dams and

Recently, the Department of the Interior and the Bureau of Reclamation issued three agency actions that will govern the agencies’ release of water from federal dams and reservoirs for the next decade.  If upheld, these actions would significantly reduce the supply of water available to the three States of the Lower Basin—Arizona, California, and Nevada—in violation of the 1922 Compact and related laws. Nevada brought this Administrative Procedure Act suit to challenge those agency actions and to protect its rights under the federal laws governing the Colorado River. Those same challenged actions affect Arizona at least as much as Nevada. Acting through the Director of the Arizona Department of Water Resources, see Ariz. Rev. Stat. § 45-105(A)(9), Arizona therefore moves to intervene and participate in the resolution of these critical issues.

State of Bay Delta Science 2016: Introduction

University of California, Davis (UC Davis) | July 1st, 2016

The first edition of SBDS presented seven shifts in perspective or changes in the way that scientists understood the Delta and water supply that had emerged in the decade

The first edition of SBDS presented seven shifts in perspective or changes in the way that scientists understood the Delta and water supply that had emerged in the decade before its publication (Healey et al. 2008). These changes in scientific understanding have profoundly affected the long-term vision for the Delta and the way that it is managed (Delta Vision Task Force 2008; Delta Stewardship Council 2010). A similar evolution in understanding has emerged in the eight years since publication of the first edition of SBDS, and we expect our understanding of the Delta and California water will continue to evolve and change as new studies are conducted. SBDS will be a living document, updated from time to time as sufficient new findings accumulate and, in particular, as the effects of climate change become more apparent. Meeting the new and unprecedented challenges to water supply and ecosystem conservation that climate change will bring will require both an intensification of scientific effort and much better coordination and planning of Delta science. The papers that make up the second edition of SBDS represent one step toward an integrated and policy-relevant compilation of science in the Delta.

State of California Department of Natural Resources Division of Fish and Game Thirtieth Biennial Report 1926-1928

State of California | September 30th, 1928

State of California Department of Natural Resources Division of Fish and Game Thirty-Fifth Biennial Report for the Years 1936-1938

State of California | September 1st, 1938

State of California Department of Natural Resources Fortieth Biennial Report of the Division of Fish and Game for the Years 1946-1948

State of California | July 1st, 1948

State of California Emergency Flood Fighting Methods

California Department of Water Resources (DWR) | August 1st, 2018

The ‘Flood Fighting Methods’ outlined in this booklet have proven effective during many years of use by DWR, United States Army Corps of Engineers, and local agencies

The ‘Flood Fighting Methods’ outlined in this booklet have proven effective during many years of use by DWR, United States Army Corps of Engineers, and local agencies on flood-related emergencies. This handbook is published by the DWR Flood Operations Branch and is designed to be used with the Flood Fighting Methods class.

State of California Fish & Game Commission Twenty-Fourth Biennial Report for the Years 1914-1916

State of California | June 30th, 1916

State of California Sea Level Guidance

California Ocean Protection Council (COPC) | May 31st, 2024

This report updates and replaces the previous 2018 ‘State of California Sea Level Rise Guidance’ and marks the fourth iteration of statewide guidance since 2010 for s

This report updates and replaces the previous 2018 ‘State of California Sea Level Rise Guidance’ and marks the fourth iteration of statewide guidance since 2010 for state and local decision-makers to incorporate best available science on sea level rise into planning, design, permitting, investments, and other decisions.

State of California Sea Level Rise Guidance

California Natural Resources Agency (CNRA) | March 14th, 2018

The climate across California is changing, and the effects, such as rising average temperatures, shrinking mountain snowpack, more intense storms, and higher sea

The climate across California is changing, and the effects, such as rising average temperatures, shrinking mountain snowpack, more intense storms, and higher sea levels are expected to continue and worsen in the coming decades. Sea-level rise is caused by the thermal expansion of warming ocean water and melting of land ice as the Earth warms. It is one of the most obvious manifestations of the trend of climate change and is an immediate and real threat to lives, livelihoods, transportation, economies, and the environment in California. In April 2017, catalyzed by direction from Governor Brown and the need to ensure that best available science was informing sea-level rise planning decisions in California, a Working Group of the California Ocean Protection Council’s Science Advisory Team (OPC-SAT) released a report, entitled “Rising Seas in California: An Update on Sea-Level Rise.” The Rising Seas Report was prepared and peer-reviewed by some of the nation’s foremost experts in coastal processes, climate and sea-level rise science, observational and modeling science, the science of extremes, and decision-making under uncertainty. The report synthesized the current state of sea-level rise science, including advances in modeling and improved understanding of the processes that could drive extreme global sea-level rise as a result of ice loss from the Greenland and Antarctic ice sheets. The report found that: Scientific understanding of sea-level rise is advancing at a rapid pace. The direction of sea-level change is clear; sea levels are rising. The rate of ice loss from the Greenland and Antarctic ice sheets is increasing, and California is particularly vulnerable to sea-level rise caused by ice loss from West Antarctica. New scientific evidence has highlighted the potential for extreme sea-level rise. Probabilities of specific sea-level increases can inform decisions. Current policy decisions are shaping our coastal future. Waiting for scientific certainty is neither a safe nor prudent option. The increased understanding of sea-level rise projections and polar ice sheet loss warranted an update to the State’s sea-level rise guidance document to ensure decisions were based on the best available science. Additionally, an increased policy focus requiring state and local governments to incorporate climate change into decision making merited an update to address the needs of both state and local audiences. This updated document, the “State of California Sea-Level Rise Guidance” (Guidance), provides a bold, science-based methodology for state and local governments to analyze and assess the risks associated with sea-level rise, and to incorporate sea-level rise into their planning, permitting, and investment decisions. This Guidance provides: 1. A synthesis of the best available science on sea- level rise projections and rates for California; 2. A step-by-step approach for state agencies and local governments to evaluate those projections and related hazard information in decision making; and 3. Preferred coastal adaptation approaches.

State of California Sea-Level Rise Guidance—2018 Update

Ocean Protection Council (OPC) | March 4th, 2018

This updated document, the “State of California Sea-Level Rise Guidance” (Guidance), provides a bold, science-based methodology for state and local governments to ana

This updated document, the “State of California Sea-Level Rise Guidance” (Guidance), provides a bold, science-based methodology for state and local governments to analyze and assess the risks associated with sea-level rise, and to incorporate sea-level rise into their planning, permitting, and investment decisions. This Guidance provides:  A synthesis of the best available science on sea-level rise projections and rates for California;  A step-by-step approach for state agencies and local governments to evaluate those projections and related hazard information in decision making; and  Preferred coastal adaptation approaches.